Influence of HLA-B27 Subtypes on Ankylosing Spondylitis Phenotype: Comment on the Article by Akassou et al


خلاصه: To the Editor I read the interesting review of Akassou and Bakri about the influence of HLA-B27 on ankylosing spondylitis (AS) phenotype which has been recently published in Clinical Medicine Insights: Arthritis and Musculoskeletal Disorders.1 They concluded in the last row of Table 2, “Fallahi et al found lower markers of activity, better functional status, better quality of life and better spinal and hip mobility in patients with B*2704 and B*2707 compared with patients with B*2705 and B*2702 in Iranian population.”1 I should draw your attention to this fact that trend toward lower activity, better functional status, better quality of life, less intense dorsal kyphosis, and less decrease in cervical slope was found in patients with B*2704 and B*2707 versus B*27:05 and B*27:02. However, these differences were not statistically significant.2 You should also note that the frequency of B*2704 and B*2707 in the study of Fallahi et al was limited to only 5.7% and 3.3% of 163 patients with AS, respectively.2





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